The customer wants to print the patent mark; The influence of foreign famous brands on our own products; Will the salesman take any responsibility?

This is protected by patent. If prosecuted by the United States, it will be investigated. If your factory is found to be OEM, it will be severely punished. You'd better not do this kind of thing. It belongs to your infringement. At that time, the customer said he didn't know, and put the blame on you.

Of course, if there is no defendant, it doesn't matter if you go to the small countryside to sell, and no one cares. However, if it is exported abroad, it is hard to say that it only earns little or no profit, but once it is accused, it is a very large sum of money.

Tell the customer directly that you are a regular manufacturer. This kind of thing is very strict. If you can't do it, you'll be fine!